Accuracy

The lightning sensor seems to be amazingly sensitive. In the winter, when our home
is dry, the sensor on the roof often detects static electricity sparks we get on the
main floor, two stories below. As far as I know, in the summer the counts shown
do indicate lightning, but perhaps tens of kilometers away.

It snowed a lot one day, but the precipitation counter didn't move. Then, a couple of days
later it was sunny all day but significant precipitation was shown. What's up?

This one is pretty easy - no heater in the rain guage. In freezing weather,
the precipitaion doesn't show up until it melts.